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The Sweetwater Authority will use innovative technology to flush all 400 miles of its system pipelines. Pnoto: Sweetwater Authority

Sweetwater Authority Taps Innovative Technology to Ensure Water Quality

The Sweetwater Authority recently began a multiyear water main flushing program using innovative technology to clean all 400 miles of pipeline in its system. It’s part of Sweetwater Authority’s use of the latest technology to deliver a safe, reliable water supply to its South San Diego County customers.

Water main flushing cleans pipeline interiors by sending a rapid flow of water through them. Sweetwater’s program is the first in the region to use a new, innovative technology resulting in less environmental impact.

“We’re committed to providing our customers with high-quality water, ensuring that every drop meets safety standards and protects public health,” said Tish Berge, Sweetwater Authority general manager. “We’re also dedicated to providing the safe, reliable water through the use of best available technology and sustainable practices.”

See the system in action in the following video. A Spanish language version is also available.

New method avoids storm drain discharge

Traditional flushing methods release water from fire hydrants at a high speed in order to flush out naturally occurring sediments accumulating in water pipes over time. Although the sediment itself is harmless, it can eventually affect water color and taste. The water used to clean the pipes often cannot be captured and ends up in the storm drain system.

The bulk of Sweetwater Authority‘s flushing program now eliminates the need to discharge water from fire hydrants during the cleaning process while delivering the same results.

With the closed-loop system and increased controls, crews are able to effectively and thoroughly flush large sections of pipeline with a single setup and staging area. This more efficient setup is less labor-intensive and allows the crew to maintain a safe hub for operations. Photo: Sweetwater Authority

With the closed-loop system and increased controls, crews are able to effectively and thoroughly flush large sections of pipeline with a single setup and staging area. This more efficient setup is less labor-intensive and allows the crew to maintain a safe hub for operations. Photo: Sweetwater Authority

Crews identify all pipes, valves, and fire hydrants located in the area to be flushed. Next, crews connect one end of a hose to a hydrant and the other end of the hose to the no discharge, or NO-DES flushing unit. The process repeats, connecting a second hose to another hydrant and the other end back into the flushing unit, creating a temporary closed loop.

Once the NO-DES flushing unit is turned on and the hydrants are open, water will push through the loop at high pressure, disrupting any accumulated sediment on the inside of the pipes. The water is pushed through a series of sock-like filters, which remove those sediments and return clean, high-quality water back into the system.

Crews closely monitor the filtration system and water quality to determine when flushing of each pipeline segment is complete.

Innovative technology, efficient and environmentally responsible

Additional member water agencies have indicated an interest in the cost-effectiveness of purchasing the NO-DES flushing units for the region and collaborating to create a shared-use program with the technology. Photo: Sweetwater Authority

Additional member water agencies have indicated an interest in the cost-effectiveness of purchasing the NO-DES flushing units for the region and collaborating to create a shared-use program with the technology. Photo: Sweetwater Authority

With the closed-loop system and increased controls, crews are able to effectively and thoroughly flush large sections of pipeline with a single setup and staging area. This more efficient setup is less labor-intensive and allows the crew to maintain a safe hub for operations.

In the National City area 75.8 miles of pipeline was recently flushed. Crews are now completing work in the Bonita area, and then will start work in Chula Vista.

Additional water agencies have indicated an interest in the cost-effectiveness of purchasing the NO-DES flushing units for the region and collaborating to create a shared-use program with the innovative technology.

“Securing a local water supply to ensure the water delivered is of the highest quality through the best technology in our projects and programs helps to maximize value for our customers while also being sustainable,” said Berge.

For more information on the program, go to www.sweetwater.org/flushing.

Sweetwater Authority is Raising Money to Help Provide Food for Families and Seniors Amid Coronavirus Pandemic

Sweetwater Authority employees are lending a helping hand to their community by raising money to help provide food for families and seniors who have been impacted by coronavirus.

General Manager of Sweetwater Authority, Tish Berge, joined KUSI’s Paul Rudy on Good Morning San Diego to discuss the details of the fundraiser.

Sweetwater Authority General Manager Gets Raise

The Sweetwater Authority governing board last week approved a 2 percent raise for General Manager Tish Berge.

The raise sets Berge’s annual salary at $231,000, retroactive to July. It marks her second raise since she was hired in June 2017 to manage Sweetwater, which serves 190,000 customers in National City, Bonita and a large portion of Chula Vista.

Board chairman Steve Castaneda said the raise, which matches a 2 percent raise given to employees, represents a cost-of-living adjustment.

Chula Vista fifth graders enjoy their first visit to the new Hydro Station educational facility. Photo: Sweetwater Authority

New Educational Hydro Station Project Opens in Chula Vista

The first Hydro Station in California opened August 15 in Chula Vista.

The interactive educational space is a joint partnership between the Sweetwater Authority, Otay Water District, and the Chula Vista Elementary School District.

The Hydro Station, at the Richard A. Reynolds Groundwater Desalination Facility, features learning exhibits and hands-on activities to introduce fifth grade students to the ecological cycle of water, water conservation, water quality, and careers in the water industry.

More than 4,000 students are expected to visit the Hydro Station annually.

Making the world ‘a better place’

“The Hydro Station introduces our students to the world of work in the water industry and inspires them at an early age to consider careers in science, technology, engineering, art, and mathematics,” said CVESD Superintendent Dr. Francisco Escobedo. “With this station, we expose students to careers that can change the trajectory of entire families, opening the door to high-wage careers that our students might not have thought were possible.

“The students also explore ways to make the world a better place through clean water, and water conservation,” added Escobedo.

Students drink in details about water conservation at the opening of the Hydro Station in Chula Vista. Photo: Sweetwater Authority

Students drink in details about water conservation at the opening of the Hydro Station in Chula Vista. Photo: Sweetwater Authority

New generation encouraged to consider careers as water industry professionals

More than 2,800 people work in the water and wastewater sector at the San Diego County Water Authority and its 24 member agencies. One-third of these industry professionals will be eligible for retirement in the next few years.

“It’s an opportunity for a new generation to join us in our mission to deliver safe and reliable water to hundreds and thousands of people in communities that rely on us as water professionals,” said Tish Berge, Sweetwater Authority general manager.

As part of the Hydro Station experience, students will have three dedicated days focused on career opportunities in Information and Communication Technologies, Clean Energy, and the Blue Economy. They will learn how their strengths, interests, and values may align with career options. Hands-on activities will also help them make connections to specific careers.

Hydro Station mission is about education and conservation

“I have served many years in the water industry, which has allowed me to experience the evolving industry climate firsthand,” said Mark Watton, Otay Water District general manager. “The high level of retirements, new technologies, and increased demand for safe drinking water all contribute to the availability of good, stable careers and employment.”

“We want to make sure that a rewarding career in the water and wastewater industry is within reach for as many local students as possible who are vocational or college bound, and the Hydro Station helps us do that,” he added.

Visitors to the new Hydro Station's grand opening mark the occasion with a selfie. Photo: Sweetwater Authority

Visitors to the new Hydro Station’s grand opening mark the occasion with a selfie. Photo: Sweetwater Authority

The Hydro Station’s location is ideal to educate students on how their strengths, interests, and values can connect with careers in the water industry while presenting opportunities to solve real-world problems through the Engineering Design Process. It will also serve to educate children and their families, as well as the community, on the thoughtful use of water resources.